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3163 Randi (1981 QM)
Classification: Mars-crossing Asteroid          SPK-ID: 2003163
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3356960964192835 4.5054e-08  
a 2.393342344322653 1.0128e-08 AU
q 1.589906661938562 1.0923e-07 AU
i 3.087433291774738 6.27e-06 deg
node 194.0687661295161 8.5253e-05 deg
peri 121.6064162516139 8.5729e-05 deg
M 358.1156168940096 9.7371e-06 deg
tp 2457007.579007380162
(2014-Dec-16.07900738)
3.6604e-05 JED
period 1352.401562483096
3.70
8.5844e-06
2.35e-08
d
yr
n .2661931263514786 1.6897e-09 deg/d
Q 3.196778026706744 1.3528e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1073  
   data-arc span      25513 days (69.85 yr)  
   first obs. used      1944-09-13  
   last obs. used      2014-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4884  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:56:51  

Additional Information
 Earth MOID = .580162 AU 
 T_jup = 3.450 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO302081  
rotation period rot_per 59.50 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/astero id/lightcurves.htm]

3163 Randi (1981 QM)          Discovered 1981-Aug-28 by Kowal, C. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 QM = 1944 RH = 1970 RK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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